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Four Seasons 39608 A/C Expansion Valve - Front
| Brand | Four Seasons 39608 |
|---|---|
| Position | Front |
| Color | Aluminum |
| Description | Expansion Valves |
| Liquid Inlet Fitting Gender | Female |
| Liquid Inlet Fitting Thread Diameter | No. 6 |
| Liquid Inlet Size IN | 0.4 |
| Liquid Inlet Size MM | 10.15 |
| Liquid Inlet Style | O-Ring |
| Liquid Inlet Thread Type | Not Threaded |
| Liquid Inlet Type | O-Ring |
| Liquid Outlet Fitting Gender | Female |
| Liquid Outlet Fitting Thread Diameter | No. 8 |
| Liquid Outlet Style | O-Ring |
| Liquid Outlet Thread Type | Not Threaded |
| Liquid Outlet Type | O-Ring |
| Lqd Out Size IN | 0.550 |
| Lqd Out Size MM | 14.000 |
| Material | Aluminum |
| Meets / Exceeds OEM? | Yes |
| Mounting Hole Quantity | 2 |
| Refrigerant Type | R134A |
| Style | w/o Solenoid |
| Suc In Size IN | 0.700 |
| Suc In Size MM | 17.8 |
| Suc Out Size IN | 0.72 |
| Suc Out Size MM | 18.3 |
| Suction Inlet Fitting Gender | Female |
| Suction Inlet Fitting Thread Diameter | No. 10 |
| Suction Inlet Style | O-Ring |
| Suction Inlet Thread Type | Not Threaded |
| Suction Inlet Type | O-Ring |
| Suction Outlet Fitting Gender | Female |
| Suction Outlet Fitting Thread Diameter | No. 12 |
| Suction Outlet Style | O-Ring |
| Suction Outlet Thread Type | Not Threaded |
| Suction Outlet Type | O-Ring |
| Super Heat | -1.500 |
| Switch Included? | Not Included |
| Tonnage | 1.000 |
| Type | Block Type |
| Product line | Expansion Valve |
| Fits | INFINITI and Nissan · 21 vehicles |
OE direct replacement. Meets or exceeds OEM requirements for dependable service.
Aluminum construction. Lightweight design with corrosion-resistant durability.
Block type design. O-ring fittings and no-solenoid style simplify installation.
Cross-references Four Seasons 39608, UAC EX10621C and 217621 for the same application. See all 7.
Four Seasons 39608 Expansion Valve Overview
Four Seasons 39608 is a block-type A/C expansion valve for R134A systems. Built from aluminum and configured without a solenoid, it meters refrigerant flow to help maintain proper evaporator performance in supported Infiniti and Nissan front HVAC applications.
This Four Seasons Expansion Valve line is focused on OE-style replacement fitment and system-specific control of refrigerant delivery. Part number 39608 is listed for front HVAC service on Infiniti QX80, Infiniti QX56, and Nissan Armada applications.
Key Features
- Block-type A/C expansion valve for R134A refrigerant systems
- Aluminum construction with aluminum finish
- Female O-ring suction and liquid connections
- 2 mounting holes for direct HVAC service fitment
- Style: without solenoid
- Meets or exceeds OEM requirements
- Super heat specification: -1.500
- Tonnage rating: 1.000
Fitment Details
- Fits 2024 INFINITI QX80, Front, Expansion Valve
- Fits 2014-2022 INFINITI QX80, Front, Expansion Valve
- Fits 2023 INFINITI QX80, N/A, Expansion Valve
- Fits 2017-2024 Nissan Armada, Front, Expansion Valve
- Fits 2013 INFINITI QX56, Front, Expansion Valve
- Fits 2012 INFINITI QX56, Front, From 3/12; Expansion Valve
What This Part Helps Address
- Inconsistent cabin cooling from improper refrigerant metering
- Warm air from the vents when the A/C system is underperforming
- Evaporator flow control issues in front HVAC service applications
- Expansion valve leakage or restriction in R134A systems
- Restoration of proper A/C pressure balance after component replacement
Installation Notes
Verify the vehicle’s refrigerant type, connection style, and mounting layout before installation. This valve uses female O-ring fittings with No. 10 and No. 12 suction connections and No. 6 and No. 8 liquid connections, so matching the original HVAC hardware is important for correct service. Confirm front application details for Infiniti QX80, Infiniti QX56, and Nissan Armada models before replacing the original valve.
Part number 39608 is also cross-referenced with UAC EX10621C for the same application.
Quality Assurance
Four Seasons 39608 is listed as meeting or exceeding OEM requirements for the specified applications. The Four Seasons Expansion Valve line is built for direct replacement service in automotive HVAC systems, with application-specific fitment for Infiniti and Nissan front A/C configurations.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2024 | INFINITI | QX80 | Front | Expansion Valve |
| 2024 | Nissan | Armada | Front | Expansion Valve |
| 2023 | INFINITI | QX80 | N/A | Expansion Valve |
| 2023 | Nissan | Armada | Front | Expansion Valve |
| 2022 | INFINITI | QX80 | Front | Expansion Valve |
| 2022 | Nissan | Armada | Front | Expansion Valve |
| 2021 | INFINITI | QX80 | Front | Expansion Valve |
| 2021 | Nissan | Armada | Front | Expansion Valve |
| 2020 | INFINITI | QX80 | Front | Expansion Valve |
| 2020 | Nissan | Armada | Front | Expansion Valve |
| 2019 | INFINITI | QX80 | Front | Expansion Valve |
| 2019 | Nissan | Armada | Front | Expansion Valve |
| 2018 | INFINITI | QX80 | Front | Expansion Valve |
| 2018 | Nissan | Armada | Front | Expansion Valve |
| 2017 | INFINITI | QX80 | Front | Expansion Valve |
| 2017 | Nissan | Armada | Front | Expansion Valve |
| 2016 | INFINITI | QX80 | Front | Expansion Valve |
| 2015 | INFINITI | QX80 | Front | Expansion Valve |
| 2014 | INFINITI | QX80 | Front | Expansion Valve |
| 2013 | INFINITI | QX56 | Front | Expansion Valve |
| 2012 | INFINITI | QX56 | Front | From 3/12; Expansion Valve |
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